Lift-all jack

ABSTRACT

A lift-all jack having a generally horizontally disposed frame member with an anchor fixedly attached to one end of the frame and normally extending therefrom, an air cylinder fixedly disposed along the frame member having a stationary member horizontally attached to the frame and a reciprocating ram designed to be displaced away from the anchor member. A pair of generally parallel lifting bars pivotally connected at one end thereof to the reciprocating member and pivotally connected at the other end to a lifting cradle, a torque-holding arm pivotally connected to the lifting cradle at one end thereof and pivotally connected to the upper portion of the anchor at the other end thereof, whereby actuation of the power cylinder horizontally away from the anchor will induce a vertical movement of the lifting cradle and a load disposed thereupon. A method of lifting one end of a vehicle which will minimize lateral displacement during the operation including the steps of: pivotally holding a lifting cradle about a point remote from said cradle and at a height equal to or greater than the height desired of the lifting cradle.

United States Patent Primary Examiner-Othell M. Simpson Attorney-Bums,Doane, Swecker & Mathis ABSTRACT: A lift-all jack having a generallyhorizontally disposed frame member with an anchor fixedly attached toone end of the frame and normally extending therefrom, an air cylinderfixedly disposed along the frame member having a stationary memberhorizontally attached to the frame and a reciprocating ram designed tobe displaced away from the anchor member. A pair of generally parallellifting bars pivotally connected at one end thereof to the reciprocatingmember and pivotally connected at the other end to a lifting cradle, atorque-holding arm pivotally connected to the lifting cradle at one endthereof and pivotally connected to the upper portion of the anchor atthe other end thereof, whereby actuation of the power cylinderhorizontally away from the anchor will induce a vertical movement of thelifting cradle and a load disposed thereupon.

A method of lifting one end of a vehicle which will minimize lateraldisplacement during the operation including the steps of: pivotallyholding a lifting cradle about a point remote from said cradle and at aheight equal to or greater than the height desired of the liftingcradle.

rmmzm m2 3.6321085 SHEET 1 [IF 2 IV 20 v 5 INVENTOR PATENTEU JAN 4 B72SHEET 2 BF 2 LIFT-ALL JACK BACKGROUND OF THE INVENTION This inventionrelates to a lift-all jack of the type which may be used in a variety oflocations but primarily in a vehicle garage or repair shop. In repairingor adjusting the various parts of an automobile it is frequentlydesirable to lift one end or one side of the vehicle to facilitate theoperation. As an example, in front-wheel balancing operations bothwheels are lifted from the ground and rapidly rotated to determine theextent of the out-of-balance present and the amount and location ofweights which would bring the wheels into dynamic balance. In order torapidly facilitate the execution of the balancing operation, or otherrepair procedures, it would be desirable to have a portable jack readilyavailable.

Various types of portable lifts or jacks have been proposed for use inrepair shops. Frequently, however, the previously known jacks have beendesigned to be engageable with the bumper of an automobile. While bumperjacks are suitable for some applications, approximately 75 percent ofbumpers of present day vehicles are not designed to support the weightof an automobile in this manner. Further, when tires are balanced on thevehicle, the automobile has to be lifted by the frame.

In contrast another type of lifting device is a frame jack. Frame jacksare typically hydraulically operated by pumping a hydraulic fluid to apower cylinder. Jacks of this type often carry internally a sump ofhydraulic fluid and therefore are heavy and cumbersome to accuratelyposition under a vehicle. Further, a considerable amount of manualpumping is required with hydraulic jacks before the desired vehicleheight is attained.

Some frame jacks have been designed to operate from a screw mechanism.Such lifting devices, however, are difficult and time consuming tooperate, and therefore are typically not suitable for use in a repairgarage where a number of vehicles are worked upon in a day.

A probelm encountered with both bumper and frame-type jacks is thetendency of the lifting pad which contacts the vehicle to be laterallydisplaced as it raises. Typically, this lateral displacement may be asmuch as 8 to 10 inches. Closely associated with the lateral displacementproblem is the installable nature of most lifting devices. In thisconnection many previously known bumperand frame-type jacks have beensupported on a four-wheeled frame to facilitate movement of the devicewhen not in use. However, as the vehicle is lifted and laterallydisplaced the jack has a tendency to roll under or away from thevehicle. This propensity to roll or shift as the vehicle is being raisedor even when the vehicle is in the fully elevated position, as a resultof something bumping into the vehicle, presents a potential hazard torepairmen working around the lifted vehicle. Another hazard with somepreviously known devices is the possibility that the vehicle mayunexpectedly drop from the elevated position if the lifting mechanismshould fail.

It would therefore be desirable to have a frame jack which would belight and easy to manipulate, yet rapid in operation, It would furtherbe desirable to have a frame jack that could be actuated from a powersource readily accessible in repair garages. It would also be desirableto have a frame jack and method of operation which would minimizelateral displacement of the lifting cradle during the lifting operation.Also it would be desirable to minimize or eliminate the possibility ofthe vehicle rolling or shifting after it has been raised or elevated toa repair position and further minimize the possibility of the vehicledropping unexpectedly from the elevated position.

OBJECTS AND SUMMARY OF THE INVENTION Objects It is therefore a generalobject of the invention to provide a method and apparatus foralleviating or minimizing problems of the type previously discussed.

It is a particular object of the invention to provide a method andapparatus for lifting a portion of a vehicle such as for example anautomobile in a vertical manner with a minimum of lateral displacement.

It is a further object of the invention to provide a method andapparatus for lifting a portion of a vehicle, such as for example anautomobile, with a readily available source of power found in mostrepair shops.

It is another object of the invention to provide a method and apparatusfor lifting a vehicle, such as for example an automobile, with a devicewhich may be easily transported and rapidly positioned under the frameof the vehicle.

It is still another object of the invention to provide a method andapparatus for lifting a vehicle, such as for example an automobile, in arapid and effortless manner which will minimize or eliminate anytendency of the vehicle to roll or shift in the elevated position.

It is yet another object of the invention to provide a method andapparatus for locking the lifting device in an elevated position tominimize the possibility of an unexpected dropping of the elevatedvehicle.

Brief Summary An apparatus for accomplishing at least some of theforegoing objects comprises a generally horizontally disposed framehaving a vertically extending anchor member integrally attached at oneend thereof. A power cylinder is longitudinally aligned with and fixedlyattached to the horizontal frame and is adapted to have a ram of thepower cylinder deployed away from the anchor member. A lifting cradlesuitable for engagement with a frame of an automobile is connected tothe ram of the power cylinder by means of a parallel linkage that ispivoted at its ends to the ram and lifting cradle. A torque-holding armis then pivotally attached to the cradle at one end and the upperportion of the anchor at the other end, whereby a horizontal translationof the power ram will induce vertical movement of the lifting cradle.

A significant method aspect of the invention comprises positioning alifting cradle under the frame of an automobile, holding the cradle padabout a pivot point which is remote from and generally higher than theelevation desired by the cradle pad, and horizontally moving one end ofa fixed length bar under the cradle pad by pivotally applying ahorizontal force to one end thereof while the other end of the fixed baris pivotally connected to said cradle pad. Thus, the cradle pad will beraised about the pivot point with a minimum amount of lateraltranslation.

THE DRAWINGS A lift-all jack constructed in accordance with a preferredembodiment of the invention is illustrated in the accompanying drawingsin which:

FIG. 1 is a side elevational view of a vehicle lifted by a liftall jackaccording to a preferred embodiment of the invention;

FIG. 2 is a side elevational view of the lift-all jack of the inventionpartially in cross section, disclosing the interior of the powercylinder when the lift-all jack is in the lowered position;

FIG. 3 is a side elevational view of the lift-all jack in the raisedposition and taken partially in section to disclose multiple aperturesfor locking the jack in a raised position;

FIG. 4 is a top view of the lift-all jack shown in FIG. 2;

FIG. 5 is a sectional view taken along section line 5-5 of FIG. 3,disclosing the lifting cradle mechanism in elevated position; and

FIG. 6 is a sectional view taken along section line 6-6 of FIG. 3,disclosing the locking mechanism of the invention.

DETAILED DESCRIPTION Referring to the drawings wherein like numeralsdesignate like parts, and particularly to FIG. 1 thereof, there will beseen a vehicle I0 lifted at one end thereof by a lift-all jack 12.

The jack is provided with a generally horizontally disposed frame 14which is supported above the surface 16 by a wheel assembly 18positioned on both sides of the frame and a flat stabilizing pad 20. Thejack frame 14 is provided at one end with a vertically extending anchor22. The frame is further provided with a horizontally disposed powercylinder 24. A lifting cradle 26 is positioned beneath the frame of thevehicle to be lifted. The lifting cradle is connected to the powercylinder by means of parallel lifting bars 28. The lifting bars 28 arepivotally connected at their ends to a portion of the power cylinder 24and the lifting pad 26. The lifting pad is constrained for pivotalrotation about an upper portion of the anchor 22 by a holding arm 30.The lift-all jack is further provided with a handle 32 so that anoperator may manipulate the jack beneath the frame of a vehicle to beelevated.

Referring now to FIGS. 2 and 4, there will be seen a lifting jack asshown in FIG. 1 but disposed in a lowered position. The frame 14comprises a pair of longitudinally extending generally parallel strips15 and 17. The strips 15 and 17 are connected at their forward end by astop plate 34 spanning an upper portion thereof and a stabilizing pad 36spanning a lower portion thereof. The stabilizing pad extends beyond theframe member 14 approximately one-half the width of the frame member oneach side of the frame. This lateral extension on the stabilizing pad 36provides a dimension of stability not encountered in previously knowndevices.

The frame 14, as previously discussed, is provided with a pair of wheelassemblies 18 journaled for rotation one each on the lateral surfaces ofthe frame strips 15 and 17. The wheel assemblies are positioned slightlyto the left, as viewed in FIG. 2, of the center of gravity of thelift-all jack such that the jack pivots about the wheel fulcrum in aclockwise direction and the pad 36 normally rests on the ground. Anoperator, however, may easily tilt the jack about the wheel fulcrum byapplying downward leverage to the handle 32, to effortlessly manipulatethe lift-alljack under the frame of an automobile.

The frame 14 is further provided at the rearward portion thereof with anormally extending anchor member 22. The rearward anchor 22 is composedof normally extending members 23 and 25 which are integral with theframe strips 15 and 17 respectively and extend to a height at leastequal to but preferably greater than the maximum lifting height of theeradle pad for reasons which will be discussed hereinafter.

Fixedly positioned in a longitudinal manner along the frame member 14 isa power cylinder 24. The power cylinder 24 is provided with acylindrical casing 38 which is fixedly attached as by welding betweenthe parallel frame strips 15 and 17, as best seen in FIGS. 2 and 4. Apower ram 40 is positioned for longitudinal reciprocation within thecylindrical casing 38.

An air line 50 is connected to a source of compressed air (not shown),which is readily available in most garages and repair shops, and leadsinto a two-way air valve48 connected to the base of the anchor 22. Thevalve 48 is designed to feed compressed air from line 50 into line 51 orconnect line 51 with the atmosphere. Separate air valves for admissionto and exhaust of air from the cylinder may be used if desired.

The power ram 40 is provided at the rearward end thereof with a cylinderhead 42 designed to reciprocate in intimate sliding contact along theinner cylindrical surface of the cylindrical casing 38. The head 42 isprovided at a lateral mid portion thereof with a circumferential O-ring44 or other suitable sealing devices such as pliable leathers.

The air line 51 extends downstream of the two-way valve 48 and throughthe end wall 46 of the cylindrical casing 38. Thus, a source ofcompressed air may be connected with the power cylinder 24 for drivingthe ram 40 horizontally away from the anchor 22.

A pair of parallel lifting bars 28 are pivotally connected on both sidesof the power ram 40, as best seen in FIGS. 2-5, by transverselyextending pin connections 52, 53.

At the opposite ends of both sets of parallel lifting bars 28 a liftingcradle 26 is provided which is pivotally connected to the lifting bars28 by pin bearings 54 and 55.

The rearward pin connection 53, as best seen in FIG. 5, extends beyondthe width of the lifting bars 28 and serves as a suitable connectingmeans for a pair of return springs 58, which extend longitudinally alongthe power cylinder. The other ends of return springs 58 are fixedlyattached to a pair of taps 60, as best seen in FIGS. 3 and 4.

Referring to FIG. 5, the interior walls of the frame strips 15 and 17are provided with L-shaped running platforms 63. The forward end of thetranslating power ram 40 is provided with a pair of wheels 65 journaledfor rotation about the lateral faces of a lower portion of the forwardend of the power ram 40. These rollers are designed to ride upon therunning platforms 63. Thus, the power ram is supported for longitudinaltranslation along the frame member 14.

As best seen in FIGS. 2 and 3, the lifting cradle 26 is constrained topivot about an uppermost portion of the anchor 22 by a torque-holdingarm 30. The torque-holding arm is pivotally connected at its oppositeends first to the lifting cradle through the pin bearing 54, as bestseen in FIG. 5, and at its opposite end to a pin bearing connection 67at the uppermost portion of the anchor 22.

The torque-holding arm 30 is composed of three segments 68, 69 and 70which are integrally connected at an angle with respect to each other,so that in the lower position, as shown in FIG. 2, the torque-holdingarm 30 will conform to the dimensions of the horizontally disposed frameand power ram so that the jack may be easily positioned beneath theframe of a lowlying vehicle.

Referring to FIGS. 3 and 6, there will be seen a locking mechanism 70which comprises a longitudinally extending rod which runs through a pairof bearing collars 72 and a has a normally extending handle 74positioned adjacent the anchor 22. The opposite end of the rod 71 isprovided with a normally extending segment 76, as best seen in FIG. 6.Normally disposed and connected to the segment 76 is a lockpin 78 whichextends through an aperture 80 in the frame strip 17 and through one ofa plurality of apertures 82 in the translating power ram 40. Thus, itcan be seen that when the jack mechanism is raised to the desiredelevation, the lock handle 74 may be rotated to withdraw the locking pin78 from contact with the power ram until a selected aperture,corresponding to a desired height of the cradle 26, is aligned with theaxis of the aperture 80 in the frame strip 17. When alignment isobtained, the handle may be rotated in the opposite direction to engagethe locking pin 78 with the desired aperture, and thus the liftingmechanism is locked at the desired height to prevent unexpected droppingof the elevated vehicle if the pressure system should fail.

The Method When it is desired to raise a vehicle, such as an automobile,for balancing the front tires or making other repairs, the forwardportion of the lift-all jack 12 is positioned until the cradle pad 26lies beneath the frame of the automobile. The air line 50 is thenconnected to an air compressor and the two-way valve 48 is actuated todeliver air to the power cylinder 24. The ram 40 is then forced in ahorizontal direction away from the anchor 22, riding at its outer end onrunning platforms 63. The parallel lifting bars 28 pivotally connectedto the power cylinder and the lifting cradle simultaneously rise. Thelifting cradle pivotally connected to the anchor by the fixed linktorque arm 30 therefore pivots upwardly. The parallel lifting arms 28rise at an identical angle and therefore the upper portion of thelifting cradle 26 is retained in a horizontal posture throughout thelifting operation.

If it is desired to utilize the maximum vertical lift of the jack, theram will be pressurized until it reaches the crossing plate or stopmember 34, as best seen in FIG. 3. The lock mechanism is then rotatedinto position at the furthermost aperture 82 in the translating ramwhich will be in register with the fixed aperture in the frame 17. Thetwo-way valve may then be positioned in a neutral position and theautomobile is ready to be worked upon or repaired. It will be realizedthat the lateral extent of the stabilizing pad 36 will prevent atendency for the automobile to tilt while it is in the erected positionand further rolling of the vehicle in the lifted position will beminimized.

The remote pivot point 67 of the anchor 22 is higher than the maximumlift of the cradle pad. The cradle will pivot about this relatively longpivot arm in a small arc and assume a practically vertical ascent. Itwill be realized, however, that there will be a slight amount ofextension toward the vehicle and away from the anchor as the cradle padis raised in this small arc. It should be noted, however, that thevehicle is pivoted about the rear axis and therefore there is a slightamount of withdrawal of the frame portion of the automobile from thejack mechanism as it follows an are having an axis through the rear axisof the automobile. In other words the jack extends toward the automobileand away from the anchor while the automobile extends slightly away fromthe anchor. Thus, the tendency of the vehicle to be laterally displacedas it raises is minimized.

When it is desired to lower the vehicle, the power cylinder isrepressurized by rotation of the two-way valve, so that the lockpin 78may be disengaged from the aperture 82 in the power ram 40. The two-wayvalve is then positioned to open the interior of the air cylinder to theatmosphere and the vehicle is quickly lowered. The lifting cradle 26 isfully disposed in its lowermost position by the action of the returnsprings 58 positioned on either side of the jack. The jack is then readyfor another lifting operation.

It will be appreciated that the invention as described above inconnection with a preferred embodiment thereof is easily manipulated byan operator and will rapidly operate from a compressed air source whichis standard in most repair shops. The lifting jack is stable in thelifted position by means of the laterally extending stabilizing pads 36and the absence of rollers.

Lateral displacement of the vehicle during raising is avoided by the useof a pivot higher than the extent to which the jack may be raised.Further, the jack may be locked in a raised position so as to eliminatethe possibility of the jack accidentally descending while repairs uponthe automobile are taking place.

Although the invention has been described with reference to a preferredembodiment, it will be appreciated that additions, deletions,substitutions and modifications, and other changes not specificallydisclosed or described, may be made which will fall within the purviewof the appended claims.

What is claimed is: 1. An airjack comprising: a frame member; an anchorfixedly attached to said frame member at one end thereof and generallynormally extending with respect thereto; an air cylinder having astationary member fixedly attached to said frame member, and

a reciprocating member, designed for displacement away from said anchorwhen the jack is being raised and toward said anchor when the jack isbeing lowered;

a lifting cradle;

a pair of generally parallel cradle lifting bars each being pivotallyconnected to the reciprocating portion of said air cylinder at one endthereof and pivotally connected to said lifting cradle at the other endthereof; and

a torque-holding arm pivotally connected to said lifting cradle at oneend thereof and pivotally connected to said anchor at the other endthereof, whereby actuation of said power cylinder horizontally away fromsaid anchor will induce a vertical movement of said lifting cradle whilesimultaneously maintaining the cradle in a generally horizontal posture.

2. An air jack as defined in claim 1 wherein:

said torque-holding arm is pivotally connected to said anchor at anuppermost position thereupon whereby the height of said pivot is greaterthan or equal to the operating height of said lifting cradle.

3. An airjack as defined in claim 1 wherein: said reciprocating memberis provided with roller means journaled thereto for supporting saidreciprocating member in translation upon said frame member. 4. An airack as defined rn clarm l and further comprising:

a stop member positioned upon said frame remotely from said anchor forlimiting the extension of said reciprocating member.

5. An airjack as defined in claim 1 and further comprising:

a jack-stabilizing pad fixedly connected to the underside of the end ofthe frame remote from said anchor.

6. An airjack as defined in claim 5 wherein:

said jack stabilizing pad is approximately twice as wide as said jackframe to minimize tilting of the object being lifted.

7. An air jack as defined in claim 5 and further comprising:

roller means journaled onto said frame at a position intermediate theends thereof for facilitating transportation of said air jack and forcombining with said jack stabilizing pad to provide a firm bearingarrangement when the jack is being utilized.

8. An air jack as defined in claim 1 and further comprising:

lock means engageable with both said frame and said reciprocating memberof said air cylinder for selectively locking said reciprocating memberto said frame.

9. An air jack as defined in claim 8 wherein:

said reciprocating member is provided with a plurality of longitudinallyaligned apertures and said frame is provided with a compatiblydimensioned aperture positioned such that as the reciprocating member isextended said plurality of longitudinally aligned aperturesprogressively pass in registry with the aperture in said frame.

10. An air jack as defined in claim 9 wherein said lock means comprises:

a rod running along said frame from a position adjacent the aperture insaid frame to a position near the anchor end of said frame, said rodhaving adjacent said aperture a first normally extending leg and asecond leg normally extending with respect to said first leg and adaptedto be positioned through the aperture in said frame and a selectedaperture in said reciprocating member whereby said reciprocating membermay be selectively locked to said frame.

11. An airjack as defined in claim 1 wherein:

said torque-holding arm is provided with a double bend intermediate theends thereof whereby said air jack may be positioned under low-lyingobjects.

12. An air jack as defined in claim 1 and further comprising:

spring return means for retracting said reciprocating member within saidstationary member when it is desired to lower said air jack.

13. An airjack as defined in claim 1 and further comprising:

a two-way valve connected to said anchor for selectively admitting airto said air cylinder for raising and lowering said air jack.

14. An air jack lifting mechanism comprising:

an anchor member extending generally vertical to the horizontal;

a generally horizontal torque-holding arm pivotally connected to theupper end of said anchor member;

an air cylinder fixedly connected in a horizontal position againstrotation to the bottom of said anchor and having a piston therein forair pressure actuated movement away from said anchor in a generallyhorizontal direction;

a lifting arm pivotally connected to said piston; and

a cradle pad pivotally connected to both said torque-holding arm andsaid lifting arm whereby actuation of said air cylinder induces upwardmovement of said cradle pad with a small component of movement away fromsaid anchor member.

1. An air jack comprising: a frame member; an anchor fixedly attached tosaid frame member at one end thereof and generally normally extendingwith respect thereto; an air cylinder having a stationary member fixedlyattached to said frame member, and a reciprocating member, designed fordisplacement away from said anchor when the jack is being raised andtoward said anchor when the jack is being lowered; a lifting cradle; apair of generally parallel cradle lifting bars each being pivotallyconnected to the reciprocating portion of said air cylinder at one endthereof and pivotally connected to said lifting cradle at the other endthereof; and a torque-holding arm pivotally connected to said liftingcradle at one end thereof and pivotally connected to said anchor at theother end thereof, whereby actuation of said power cylinder horizontallyaway from said anchor will induce a vertical movement of said liftingcradle while simultaneously maintaining the cradle in a generallyhorizontal posture.
 2. An air jack as defined in claim 1 wherein: saidtorque-holding arm is pivotally connected to said anchor at an uppermostposition thereupon whereby the height of said pivot is greater than orequal to the operating height of said lifting cradle.
 3. An air jack asdefined in claim 1 wherein: said reciprocating member is provided withroller means journaled thereto for supporting said reciprocating memberin translation upon said frame member.
 4. An air jack as defined inclaim 1 and further comprising: a stop member positioned upon said frameremotely from said anchor for limiting the extension of saidreciprocating member.
 5. An air jack as defined in claim 1 and furthercomprising: a jack-stabilizing pad fixedly connected to the underside ofthe end of the frame remote from said anchor.
 6. An air jack as definedin claim 5 wherein: said jack stabilizing pad is approximately twice aswide as said jack frame to minimize tilting of the object being lifted.7. An air jack as defined in claim 5 and further comprising: rollermeans journaled onto said frame at a position intermediate the endsthereof for facilitating transportation of said air jack and forcombining with said jack stabilizing pad to provide a firm bearingarrangement when the jack is being utilized.
 8. An air jack as definedin claim 1 and further comprising: lock means engageable with both saidframe and said reciprocating member of said air cylinder for selectivelylocking said reciprocating member to said frame.
 9. An air jack asdefined in claim 8 wherein: said reciprocating member is provided with aplurality of longitudinally aligned apertures and said frame is providedwith a compatibly dimensioned aperture positioned such that as thereciprocating member is extended said plurality of longitudinallyaligned apertures progressively pass in registry with the aperture insaid frame.
 10. An air jack as defined in claim 9 wherein said lockmeans comprises: a rod running along said frame from a position adjacentthe aperture in said frame to a position near the anchor end of saidframe, said rod having adjacent said aperture a first normally extendingleg and a second leg normally extending with respect to said first legand adapted to be positioned through the aperture in said frame and aselected aperture in said reciprocatiNg member whereby saidreciprocating member may be selectively locked to said frame.
 11. An airjack as defined in claim 1 wherein: said torque-holding arm is providedwith a double bend intermediate the ends thereof whereby said air jackmay be positioned under low-lying objects.
 12. An air jack as defined inclaim 1 and further comprising: spring return means for retracting saidreciprocating member within said stationary member when it is desired tolower said air jack.
 13. An air jack as defined in claim 1 and furthercomprising: a two-way valve connected to said anchor for selectivelyadmitting air to said air cylinder for raising and lowering said airjack.
 14. An air jack lifting mechanism comprising: an anchor memberextending generally vertical to the horizontal; a generally horizontaltorque-holding arm pivotally connected to the upper end of said anchormember; an air cylinder fixedly connected in a horizontal positionagainst rotation to the bottom of said anchor and having a pistontherein for air pressure actuated movement away from said anchor in agenerally horizontal direction; a lifting arm pivotally connected tosaid piston; and a cradle pad pivotally connected to both saidtorque-holding arm and said lifting arm whereby actuation of said aircylinder induces upward movement of said cradle pad with a smallcomponent of movement away from said anchor member.